mysqli_insert_id mysqli->insert_id Returns the auto generated id used in the last query Procedural style: mixedmysqli_insert_id objectlink Object oriented style (property): mysqli mixedinsert_id The mysqli_insert_id function returns the ID generated by a query on a table with a column having the AUTO_INCREMENT attribute. If the last query wasn't an INSERT or UPDATE statement or if the modified table does not have a column with the AUTO_INCREMENT attribute, this function will return zero. Performing an INSERT or UPDATE statement using the LAST_INSERT_ID() function will also modify the value returned by the mysqli_insert_id function. &reftitle.returnvalues; The value of the AUTO_INCREMENT field that was updated by the previous query. Returns zero if there was no previous query on the connection or if the query did not update an AUTO_INCREMENT value. If the number is greater than maximal int value, mysqli_insert_id will return a string. query("CREATE TABLE myCity LIKE City"); $query = "INSERT INTO myCity VALUES (NULL, 'Stuttgart', 'DEU', 'Stuttgart', 617000)"; $mysqli->query($query); printf ("New Record has id %d.\n", $mysqli->insert_id); /* drop table */ $mysqli->query("DROP TABLE myCity"); /* close connection */ $mysqli->close(); ?> ]]> ]]> The above examples would produce the following output: